关键词: 电磁流体控制/
快速反射镜/
消涡减振/
光轴稳定控制
English Abstract
Lorentz force filtering and fast steering mirror optical compensation in optical axis stability control for photoelectric mast
Liu Zong-Kai,Bo Yu-Ming,
Wang Jun,
Cui Ke
1.Advanced Launch Collaborative Innovation Center, Nanjing University of Science and Technology, Nanjing 210094, China
Fund Project:Project supported by the China Postdoctoral Science Foundation (Grant No. 2015M571756), the Jiangsu Postdoctoral Sustentation Fund, China (Grant No. 1401123C), the Jiangsu Youth Fund of Natural Science, China (Grant No. BK20140792), the Nanjing University of Science and Technology Independent Scientific Research Funds, China (Grant No. 30915011336), and the Shanghai Aerospace Innovation Fund, China.Received Date:20 October 2016
Accepted Date:19 January 2017
Published Online:05 April 2017
Abstract:The photoelectric mast equipped on the underwater vehicle is the key equipment for photoelectric tracking. While the vehicle moves under water, especially, at high speed, more complex vortexes are generated at the surface, which will give rise to great disturbance to the stability of optical axis. In this paper, firstly, based on the basic control equations of electromagnetic field and fluid mechanics, the effects of the Lorentz force on flow field structure and vortex induced vibration are numerical simulated with using the finite volume method with hierarchy grids. Secondly, the structural characteristics, transfer functions and PID control strategies of fast steering mirror (FSM) are analyzed. Finally, combining the transfer function of FSM and the force characteristics, the effect of the composite control on the stability of submarine photoelectric tracking system is discussed by MATLAB. The results show that the Lorentz force can adjust the boundary layer and suppress vortex induced vibration, based on which the FSM can be used to further improve the accuracy of the optical tracking system. This research offers a new exploration in the field of electromagnetic fluid control, as well as a novel development of the traditional research direction of fluid mechanics. Therefore it appears to have a certain scientific significance and practical value.
Keywords: electromagnetic fluid control/
fast steering mirror/
suppress vortex induced vibration/
optical axis stability control
